Spring brake for warp beams of looms



Jan. 1., 1929. 1,697,084

G. PICKEL SPRING BRAKE FOR WARP BEAMS OF LOOMS Filed June 27, 1927 4 Sheets-Shet 1 Jam 1, 1929.

G. PlCKEL SPRING BRAKE FOR WARP BEAMS OF Lo oMs' 4-Sheets -She'et 2 Filed June 27, 1927*" Jan 1, 1929.

G. PICKEL SPRING BRAKE FOR WARP BEAMS OF LOOMS Patented Jan; 1, 1929.

UNITED STATES PATENT OFFICE.

GEORG PICKEL, OF OHEMNITZ, GERMANY.

srnrne BRAKE FOR WARP BEAMS or LOOMS.

Application filed June 27, 1927, Serial Ho.201,896, and in Germany July 12, 1926.

Springcontrolled brake-mechanisms for the warp-beams of looms have become known.

In comparison with these brakes of known type the brake according to this invention presents different advantages.

- An adjusting screw,which is inserted into sleeve or casing serves to receive the adjusting screw in a slit extension. The brake can be loaded or relieved by corresponding shifting of this pressure-ring.

The pressure-ring permits the brake to be used for several warp beams. As the pressure-ring is arranged at the lowest possible point, it has become possible to mount this brake-mechanism on looms of any system in preserving the existing brake-means. A

foundation-plate fixed on the floor or di-.

rectly on the loom enables to instantaneously mount or remove the brake-mechanism at the interchanging of the warp beams, simply by inserting the apparatus into or b removing the same from the stationary oundationplate. As no tools are required the brake can be rapidly and easily mounted and removed. The possibility to work with the new brake-apparatus on warp beams situated at deep points is due to the fact that the height of the apparatus is reduced to the minimum as the lever-mechanism serving for relieving is not arranged above the apparatus but consists of a pressure-ring, shiftably mounted on the lower portion of the spring casing and adapted to be raised with the aid of a lever-system in order to slacken the adjusting screw with the brake element held by the same. The attendance is considerably facilitated as the adjustin can be efiected from above, so that the bra e can be applied to looms of any system.

' In order toobtain special e'flects, for instance bindings, one frequently works in .:the fabric-manufacturing with several warp beams on one loom. w Y

The new device for braking the warp beam by means of spring-pressureis applicable as well for the main beam as for the auxlllary-beams when fabrics have to be manufactured by means of several beams, the auxiliary brakes being then connected to the main-brake. These auxiliary-warp beams must be separately braked, according to the manner in which they work the material.

The spring-brake has not been used up to the resent for this purpose, counterweighte lever-brakes specially mounted in the loom having been used, which are difficult to adjust very accurately and which exert a hard shock onto the warps owing to their stability. The material is therefore put under strong stress and the uniformity of the fabric is unfavourably influenced. It is difficult to work on the warp beams as they are not easily accessible so that it is diflicult for the weaver to keep the warps in order.

' This invention relates mainly to a mainor single-warp-brake but as the same may be fitted. also, for several beam warps, with a corresponding number of auxiliary springbrakes, the inconveniences mentionedas regards the bindingand effect-warps are avoided. The connection is effected by inserting a bolt in the pressure-ring or, in the slit of the same, or by screwing a screw-bolt into the rear butt-strap on which screw the ring of the pull-rod having left-handed thread arranged on the lower portion of the auxiliary brake is arranged. The brake-cable is suspended to the opposite-end by means of a loop. To the springs, arranged similar to a swivel, the desired braking tension may be given by turning the springs to the left and for each warp-chain, in accordance with the fineness of the working of its warp. The relieving is effected uniformly from the handle of the main-brake by raising the same,"

and the loading by lowering the handle. The final pressure can be exerted with the foot as a pedal. Besides the advantages stated above another great advantage is the saving ofspace as the apparatus does not require speclal space even when several brakes are arranged. It is specially important that all the warps are free over their entire width,

the rational working, only one person is required for attendance, the putting in place and removlng is rapidly executed and an absolutely uniform fabric is produced. Notwithstanding the auxiliary. brakes the main apparatus always operates perfectly.

Several embodiments of the inventionare illustrated, by way of example, in the accompanying drawings in which Fig. 1 shows in side elevation the mainapparatus in the braking position.

Fig. 2 is a similar view to Fig. 1 partly in cross section and in releasing position.

Fig. 3 illustrates the auxiliary brake.

Fig. 4 shows in elevation the main-ap paratus and an auxiliary brake being fixed to the rear butt-strap of the pressure-ring.

Fig. 5 shows in elevation a main apparatus with two auxiliary brakes.

Into a foundation-plate a fixed on the floor a base-plate b is inserted on which a spring-casing c is mounted. In this springcasing a a spiral-spring (Z is located. On the top end of spring (Z rests a ball-bearing 6 designed to facilitate the putting under tension of said spring by a pressure-spindle f to be rotated by means of a hand-wheel. On

A the spring casing 0 an indicator 7* is cast in which a pinion r with a pointer r is arranged so that 1t can slide on a rack 9' fixed on the spiral-spring (Z by means of a screw r The pointer is thus moved in accordance with the compression of the spring so that the pressure is indicated by the pointer.

pressure-ring g, slidably mounted on the spring-casing c, has a laterally extending arm p in which an adjusting screw k is arranged. A washer it having a curved topsurface permits rotating of said screw for ad usting the brake-band in the direction in which the pull is exerted, breaking of the screw being thus prevented. A hand-lever 9 serves for puttin the brake-element under tension and for relieving the same. This hand-lever g is pivotably fixed on a bolt 1: at the top-end of the spring-casing'w and 'it is connected by a link s, pivotable round bolts 0 and '0 with a lever 'kpivotably mounted on the other side of the spring-casing on a pivot-bolt i. This lever 7c is connected by a link m, pivotably mounted on bolts Z and n, to the pressure-ring g. 1 When the hand-lever shown in Fig. 1, the brake is: applied'and submitted to the pressure of the spring (5 as the spring-casing c'intercepts the pressure of-the spring between the bottom-plate f band the spindle-disk 1 and transmits it through the pressure-ring 9 upon the brake band. n

When the lever g is raised, as shown in Flg. 2, the spring-pressure is "not relieved but the brake pressure is relieved as the loclb m connection between the pressure-ring and the spring-casing has been disengaged. The warp beam can then be. rotated by hand. Owing to the great lever-transmission even the highest sprlng-pressure can be overcome easily.

WVhen one or several auxiliary brakes have to be --applied, the brake band a: (Fig. 4) for g is lowered, as

eeaoea (Fig. is preferably inserted into the brake-band a; or This spring F can be put under tension or slackened by left or right rotation, by a lower nut G, having left handed threads and an upper nut H having right handed threads. These two nuts G, H are mounted in the spring F. A thumb-nut E prevents slackening ofrthe spring and a sleeve I prevents the nuts dropping into the spring when the same is slack; To the end D of the screw B screwed into the nut H a cable, band or the like is attached which leads to the warp beam. The lower rod or wire 00 or y respectively are attached to the bolts w, w respectively. By raising the leverg the auxiliary brakes can be rapidly rendered inoperative. When the apparatus is being removed the brake cable is disconnected from the pressure-ring.

I claim 1. A spring-controlled brake for. warp beams of looms, comprising in combination with the warp beam, a spring casing, a spring in said casing, means for compressing said spring by hand, a pressure-r ng shiftably mounted on the lower portion of said spring casing, means connecting said pressure-ring to said warp beam and attached at the one side of said spring casing, a lever arm pivotally mounted on the other side of said spring casing, means hingedly connecting said lever arm to said pressurering for raising or lowering said pressure ring to make the pressure of said spring act upon the brake or relieve said brake of the pressure of said spring.

2. A spring-controlled brake for warp beams of looms, as specified in claim 1, comprising in combination. with said pressure ring and said lever arm, a transmission lever system between said lever arm and said pressure-ring for easily overcoming the spring pressure and the loading pressure of the brake element upon the brake disk at the loading or relieving. i

3. A spring-controlled brake for warp beams of looms, as specified in claim 1, comprising in combination with the spring casing, a base plate of said sprin casing, and a foundation plate fixed 'on t e floor and designed to receive said base plate so that the brake apparatus can be rapidly and easily mounted in position and removed.

4; A spring-controlled brake for warp beams of looms, as specified in claim 1, comprising in combination with the pressure ring, bolts in said pressure ring, and auxillring and the brake element spring attached beams of looms, as specified in claim 1, comprising in combination with the pressureattached to said pressure ring and to the warp beam, a spiral to the end of said brake, element, and a threaded spindle in said spiral spring designed not only to stretch said brake element in accordance with the braking pressure to be exerted upon the braking surface and to re-adjust said braking eleinent when it has slackened but also to con nect said brake element with the brake body.

6. A spring-controlled brake for warp beams of looms, as specified in claim 1, comprising in combination with the pressurering and the brake element attached to said pressure ring and to the warp beam, a spiral spring adapted to be adjusted like a swivel attached to the end of said brake element,

and a threaded spindle in said spiral spring designed not only to stretch said brake element in accordance with the braking pressure to be exerted upon the braking surface and to re-adjust said braking element when it has slackened but also to connect said brake element with the brake body. 7. A spring-controlled brake for warp beams of looms, as specified in claim 1, com prising in combination with the spring casing and the spring in said casing, a box on said casing, a pinion in said box, a pointer made in one piece with said pinion, a rack in said spring casing and meshing with said pinion, and a screw connecting said rack to said spring so that said pointer indicates the pressure of said spring.

In testimony whereof I aflix my signature. GEORG PICKEL. 

